JP2003085926A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a disk cartridge in which the sliding area of a shutter member with a case is small to enhance dust preventing properties and the shutter member stably opens and closes an aperture. SOLUTION: The disk cartridge 10 is provided with the shutter member 42 opening and closing the aperture 22 provided at the case 14 rotatably housing a disk like disk media 12. The shutter member 42 is formed by alternately and foldably connecting a plurality of bellows plates 42A and folded to open and expanded to close the aperture 22 by sliding operation of an operation member 50 provided at a free end. The operation member 50 is guided by first and second guide grooves 26 and 28 slidably only in the direction in which the shutter member 42 opens and closes the aperture 22 and stably folds or expands the shutter member 42.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
Disc-shaped disc media used as recording / reproducing media
A disk that holds the door in a rotatable manner and prevents intrusion of dust, etc.
Related to the cartridge. [0002] For example, for portable computers
Recording / reproducing media such as optical disks and magneto-optical disks
Disc-shaped disc media are used. like this
When recording or playing back disc media,
Record to the recording surface while rotating while loaded in the live device.
-By irradiation with the laser beam,
Information is recorded by pit formation, phase change, magnetization, etc.
Or based on differences in the reflectance and polarization angle of laser light.
The recorded information is played back. In addition, recording of such disc media
To increase capacity,
Supports high recording density (track width and track pitch)
To reduce the spot diameter of the laser beam irradiated onto the recording surface.
In order to reduce the wavelength of laser light (for example, blue-violet laser
Use) and high NA (open) of the objective lens that focuses the laser beam
Number) or a combination of these has been proposed. In this way, the spot diameter of the laser beam is reduced.
Then, a cover layer that protects the recording surface of the disc media
Suppresses the attenuation of the laser beam and the focal length (with objective lens
The cover layer to reduce the distance to the recording surface)
It is necessary to reduce the thickness. Reduce the thickness of the cover layer
And the diameter of the laser beam on the surface of the cover layer is small.
In other words, the influence of dust on the surface of the cover layer cannot be ignored.
Become. For this reason, the disk media is placed in the case.
Storing to prevent dust from adhering to the disk media
A disk cartridge is used. Such a de
The disk cartridge will be described with reference to FIG.
The FIG. 8 shows a disk cartridge 100.
Has been. The disc cartridge 100 is made of resin.
The disc-shaped disc media 102 can be rotated.
Case 104 and the center of the disk medium 102
The center hole 102A provided on the recording area and the recording surface (the
(Bar layer) to expose part of 102B to the outside
And an opening 106 provided in the tube 104, and a "U" shape in cross section.
Formed on the outer surface (upper and lower surfaces) of the case 104
Open by sliding along the shallow sliding groove 104A
And a shutter member 108 for opening and closing 106.
Has been. In this disk cartridge 100, a data cartridge is
When the disk medium 102 is not used, it is shown in FIG.
The opening 106 is closed by the shutter member 108 as shown.
Intrusion of dust into the case 104 (ie,
I.e., dust and the like on the disk media 102)
It is the structure to do. On the other hand, the disk medium 102 is used.
The case 104 (disk cartridge 100)
Is loaded into the drive device and used to open and close the drive device.
Therefore, the shutter member 108 is in the sliding groove 1 of the case 104.
The opening 106 is opened by moving while sliding with 04A. As a result, as shown in FIG.
The disk media 102 can be accessed. sand
That is, the center hole 102 of the disk medium 102
A holding by rotating spindle shaft of A and recording surface 102B
Recording / reproducing head (laser head that irradiates laser light
Etc.) is possible. However, this is not the case.
In such a conventional disk cartridge 100, the opening 10
When opening and closing 6, the shutter member 108 is moved to the case 104.
The sliding groove 104A slides along with this sliding.
Wear powder is generated, and wear powder is generated from the opening 106 into the case 104.
There was a case of intrusion. In particular, the shutter member 108 is
In the configuration made of a metal material, the shutter member 108 has
Therefore, the resin case 104 is easily worn, and the wear powder
Generation amount and intrusion amount increase. Also, storage of the disk cartridge 100
Sometimes dust adhering to the sliding groove 104A may cause the opening 106 to open.
Along with the movement of the shutter member 108 accompanying the closing, the opening 10
6 may enter the case 104. Thus, the wear that has entered the case 104
Powder or dust is removed from the surface of the disk medium 102 (recording surface 10
Recording or playback when attached to the cover layer protecting 2B
This causes a loss of signal (so-called dropout). sand
That is, the conventional disk cartridge 100 as described above.
Then, shortening the wavelength of the laser beam as described above and increasing the objective lens
It was difficult to ensure dustproofness corresponding to NA. In consideration of the above fact, the present invention provides a shutter.
-The sliding area between the member and the case is small and the dustproofness is improved.
And a disc whose shutter member stably opens and closes the opening
The purpose is to obtain a cartridge. [0014] In order to achieve the above object,
The disc cartridge according to the invention described in claim 1 is,
Case that contains disc-shaped disc media in a rotatable manner
And provided in the case to access the disk media.
The access opening and multiple plate-like members are folded alternately.
Foldable and unfoldable connected and in the folding direction
A shutter member whose one end is fixed to the case;
It is provided at the other end of the shutter member and slides.
Folding the shutter member to open the opening
Or deploy the shutter member to close the opening.
And an operating member provided on the case,
Guide both ends to slide in the opening and closing direction of the opening
Guide means. In the disk cartridge according to claim 1,
Are connected so that a plurality of plate-like members can be folded alternately.
Shaft (formed in a bellows shape) with one end fixed to the case
The tatter member is in its unfolded state on one or both sides of the case
An opening for accessing the disc media
The opening is opened in the folded state. That is, when the disk medium is not used.
Is one end of the shutter member in the folding direction (hereinafter, fixed
Provided at the other end of the shutter member
The operating members are separated and the shutter member is
Unfolded state with large inclination angle of mating plate members (bellows stretched)
In this state, preferably, a plurality of plate-like members are respectively provided.
In this state, the opening is closed along the opening forming surface. to this
Thus, dust can be prevented from entering the case. On the other hand, when using disk media
The operating member slides and folds against the fixed end
Approach along the viewing direction. Then, the shutter member
Folded alternately (Each plate-like member is almost laminated in the thickness direction)
In this state, the opening is opened. This opens the opening
Access to disk media from
For example, the rotating spindle shaft of the drive device enters and
The recording / reproducing head etc.
Record information on the recording surface of the disk media.
The recorded information is reproduced. Furthermore, after using the disk media,
The operating member slides away from the fixed end and shuts down.
The tar member becomes unfolded and closes the opening again. this
As a result, the disk cartridge returns to the initial state. Here, the operating member is fixed in the opening / closing direction of the opening (fixed).
Along the contact / separation direction with respect to the fixed end)
The guide means is provided so that the guide means
The operating member is separated from the case when opening and closing the opening.
Make sure to contact and separate from the fixed end. Ie operation
The other end of the shutter member provided with the member is opposed to the fixed end.
The shutter member operates stably (folds)
Fold and unfold). The shutter member is a plurality of plate-like members.
Are connected to each other so that they can be folded and attached to the fixed end of the case.
On the other hand, the other end (operating member) can be folded
Is unfolded to open and close the opening.
Open and close the opening without moving
Therefore, as in the past, almost the entire surface of the shutter member
The sliding area with the case is extremely small compared to the moving configuration
Yes. For this reason, it accompanies sliding between the case and the shutter member.
Generation of wear powder can be suppressed or prevented. Furthermore, a shutter portion having one end fixed.
The material is folded to open the opening, in other words,
The sliding part between the cutter member and the case is a disc cartridge.
The part covered by the shutter member when storing the wedge
Therefore, dust or the like may adhere to the sliding part.
Absent. This allows sliding between the shutter member and the case.
This prevents dust adhering to the outer surface of the case from entering the case.
Stopped. Thus, the disc car according to claim 1 is provided.
The sliding area between the shutter member and the case is
Less dust-proof and the shutter member has a lower opening
Open and close. Also, the disk cartridge having the above-described configuration.
The shutter of the plate-like member constituting the shutter member.
The direction perpendicular to the folding direction (the above contact and separation direction)
This guide part is provided with a guide member protruding from the end
If the material is guided along the contact and separation direction,
When the shutter member opens and closes, the middle part is also a case
More stable (reliable) operation without separation from
Is preferred. In particular, a guide for guiding this guide member
The means is common with the guide means for guiding the operation member.
If constructed, the structure is simple and more suitable. Furthermore, the disk cartridge having the above-described configuration is used.
Urge the operating member in the closing direction of the opening
If a configuration is provided, a disk cartridge is used.
In the drive device loaded for use, the operation member is operated.
Only the mechanism to make and slide in the opening direction of the opening
All that is required is a simplified structure. DETAILED DESCRIPTION OF THE INVENTION A disc according to an embodiment of the present invention.
The cartridge 10 will be described with reference to FIGS.
Light up. For convenience of explanation, the disk cartridge 1
0 loading direction to the drive device 70 (shown as appropriate in FIG.
Arrow A direction) is the forward direction, arrow B direction, arrow C direction
Disc cartridges with the direction downward and to the right
The front / rear / left / right / upper side of the wedge 10 is expressed. FIG. 1A shows a disk cartridge 1.
A perspective view from below showing the non-use state of 0 is shown.
FIG. 1B shows the use of the disk cartridge 10.
The perspective view seen from the lower part which shows a possible state is shown. As shown in these figures, the disc car
The cartridge 10 is a disc media that is an information recording / reproducing medium.
The via 12 can be rotated in a substantially rectangular case 14 in plan view.
Contained in Noh. Disc media 12
Is formed in a disk shape, with a drive device in the center.
Set 70 is held by a rotating spindle shaft (not shown).
A center hole 12A, and
The recording surface formed on the lower surface 12B is a cover layer (both shown)
(Omitted). Each case 14 is made of a synthetic resin material.
The upper shell 16 and the lower shell 18 abut each other's peripheral walls.
Formed in the shape of a substantially rectangular box
The The lower shell 18 is recessed upward from its lower surface 18A.
There is a recess 20 formed in a rectangular shape in plan view.
Open at the center of the recess 20 in a rectangular shape in plan view.
A mouth 22 is provided. The front end of the recess 20 is the front end of the case 14.
And a shutter that will be described later.
-Left and right sides of case 14 corresponding to 40 folding spaces
Offset slightly to the left of the center of the direction
The The opening 22 has a rectangular shape slightly smaller than the recess 20.
Disc media that is shaped and housed inside the case 14
The center hole 12A of the bearing 12 and the disk medium 12
Inner edge along one radial direction (edge of center hole 12A)
A part of the lower surface 12B including the part extending from the outer periphery to the outside
Large exposure is possible. That is, the opening 22 is
Access to the disk media 12 accommodated in the case 14
It is intended for use. The bottom surface of the recess 20 surrounding the opening 22 is
The shutter contact with which the peripheral edge of the shutter 40 to be described abuts.
A contact surface 24 is provided. Also, at the rear end of the recess 20
The step with the lower surface 18A has a substantially entire length in the left-right direction.
A first guide groove 26 serving as a guide means opened forward is provided.
Is provided. Further, as shown in FIG.
Near the front end of the upper surface 16A of the bottom surface 16 (case 14)
Second guide as guide means opened upward along the direction
An id groove 28 is provided. Furthermore, the front end of the case 14 has an inner
An opening / closing mechanism chamber 32 that is a space partitioned by the wall 30 is provided.
Arrangement of tension coil spring 62 and the like which will be described later
It is for use. On the front surface 14A of the case 14, an opening / closing machine
A slit 34 communicating with the composition room 32 is provided. The front end of the case 14 has a thin plate-like gas.
An id plate 36 is attached. Guide play
The shaft 36 is positioned forward of the front edge of the opening 22.
Arranged to face the utter contact surface 24 over its entire length,
Shutter contact surface 24 (excluding the vicinity of the front edge of the opening 22
Between) and the guide slit 38 as a guide means.
Forming. The guide slit 38 is a first guide.
It faces the groove 26 over its entire length. The disc cartridge 10 has an opening.
A shutter 40 for opening and closing the door 22 is provided. Shi
The shutter 40 includes a bellows-shaped shutter member 42 and a case.
A fixed portion 44 as a fixed end fixed to the screw 14 and an opening
And an operation member 50 that is operated when the door 22 is opened and closed.
Has been. As shown in detail in FIG.
The tar member 42 has a plurality of rectangular shapes.
The bellows pre as a plate-like member (six in this embodiment)
42A are connected so that they can be folded alternately in the width direction.
Configured in the unfolded state near the outer periphery.
Since the surface abuts against the shutter abutment surface 24, the opening 22 is
It can be blocked. Specifically, the shutter member 42 is adjacent to the shutter member 42.
The matching bellows plates 42A are flush with each other
Abutting adjacent bellows plates 42A in the unfolded state
Adhesive tape on the side that becomes the valley when folding
46 to attach each bellows plate 42A
In each adhesive tape 46 side (each adhesive tape inside the valley
It can be folded alternately. In addition, as shown in FIG.
The adhesive tape 46 affixed to the upper surface of the rate 42A is a snake
It is slightly shorter than the longitudinal dimension of the stomach plate 42A
Attached to both ends in the longitudinal direction of the bellows plate 42A.
There is no such thing. As a result, the shutter member 4
2 (the upper surface of each bellows plate 42A)
In this configuration, the butt contact surface 24 is in contact with no gap. Further, the shutter member 42 has a bellows pre-
The length of the bellows plate 42A is longer than the longitudinal dimension of the seat 42A.
A guide member formed in the shape of a long pin having a smaller diameter than the plate thickness;
The guide pin 48 is provided. Guide pin 48
Is due to the adhesive tape 46 of the plurality of bellows plates 42A.
Of the plurality of connecting portions, the shutter member 42 is folded.
Folded upwards (shutter contact surface 24 side)
Connected to the connecting portion 42B (two in this embodiment).
ing. Specifically, as shown in FIG.
The bellows plates 4 connected at 42B and adjacent to each other
The lower surface side of the 2A butting part (becomes a valley in the folded state)
The guide pin 48 is inserted into the notch 42C formed on the side).
Insert not to protrude in the thickness direction of the bellows plate 42A
In this state, the adhesive tape 46 is also applied to the guide pin 48.
Affixed. As a result, the guide pin 48 is
Prevents the rate 42A from falling off the plate thickness direction and longitudinal direction
In this state, it is held by the connecting portion 42B. In this state, the guide pin 48 has both ends thereof.
Are respectively removed from the longitudinal ends of the bellows plate 42A.
Protruding from the rear end of the bellows plate 42A
The protruding portion 48A that protrudes is the first guide groove 26 of the case 14.
Of the bellows plate 42A.
A protrusion 48B protruding from the front end is a guide slit 38.
It is the structure inserted so that sliding is possible. A snake is attached to one end of the shutter member 42.
Narrower than belly plate 42A and bellows plate 42A
The fixed portion 44 having the same thickness serves as one end portion of the shutter member 42.
The bellows plate 42A and the widthwise end of each other were abutted
In the state, the adhesive tape 46 is applied to the lower surface of the abutting portion.
It is connected so that it can be folded. Fixed part 44
On the shutter contact surface 24 at the left end of the recess 20
It is fixed along the longitudinal direction by bonding or the like.
On the other hand, an operation member 50 is provided at the other end of the shutter member 42.
It is connected. The operating member 50 is from the bellows plate 42A.
Has a connection part 52 that is long and has the same thickness as the bellows plate 42A.
It is. The connecting portion 52 is at the center in the longitudinal direction.
A bellows plate 42A which is the other end of the shutter member 42
And the end of the abutting part in the state of abutting each other in the width direction
By attaching the adhesive tape 46 to the lower surface, the shutter part
The other end of the material 42 is foldably connected. The connecting portion 52 is connected to the shutter contact surface 24.
The accordion plate 42
A rear end 52A protruding from the rear end of A is
The bellows plug is slidably inserted into the first guide groove 26.
Front end 52B protruding from the front end of rate 42A is a guy
The slits 38 are slidably inserted. Further, the operating member 50 has a front end 52B with a cable.
Bent along the front surface 14A of the sleeve 14 and to the right
The widened operation portion 54 and the upper end portion of the operation portion 54 are upper shells.
A holding portion 56 bent along the upper surface 16A of the lug 16 is provided.
It is. The end of the holding part 56 is bent downward.
The guide portion 58 is slidable in the second guide groove 28.
Has been inserted. Thus, the operating member 50 is connected to the connecting portion 5.
2 by the first guide groove 26 into which the rear end 52A is inserted.
Movement in the vertical direction is restricted and the guide portion 58 is
The second guide groove 28 is inserted to move in the front-rear direction.
It is a regulated configuration. Further, the operation member 50 has the holding portions 56 that are mutually connected.
The front end portion of the case 14 is sandwiched between the connection portion 52 and the connection portion 52 facing each other.
Position in the vertical direction (horizontal virtual axis
Rotation around) is surely prevented, and connection 52
A wider holding portion 56 is arranged along the upper surface 16A.
This reliably prevents rotation around the virtual axis in the front-rear direction,
A wide guide provided at the tip of the wide holding portion 56
The portion 58 enters the second guide groove 28 so that the vertical direction
In this configuration, rotation around the virtual axis is reliably prevented. That is, the operation member 50 is provided with the first guide groove.
26, by the second guide groove 28, the shutter member 42
Allow only left / right movement (slide) in the folding direction
As well as being backed up, it will also be unstable depending on your own shape etc.
It is possible to slide left and right smoothly
The The operation portion 54 of the operation member 50 has a rear side.
And enters the opening / closing mechanism chamber 32 through the slit 34.
A spring hook 60 is provided. This spring hook 60
The one end portion is biased to the right end portion of the opening / closing mechanism chamber 32.
The other end of the tension coil spring 62 as a means is locked
The operating portion is operated by the urging force of the tension coil spring 62.
The material 50 is urged to the right. It should be noted that the operating member 50 has a connecting portion 52 that is recessed.
Stopper portion 2 which is a step portion between the right end portion of 20 and the lower surface 18A
By abutting against 0A, further rightward movement is restricted.
It has come to be controlled. In this state, the right side of the operation unit 54
A space between the end face 54A and the right edge of the slit 34 will be described later.
A clearance sufficient for the opening / closing pin 74 of the drive device 70 to enter.
The dimensions of the respective parts are determined so that is formed. In this way, the shutter member 42 can be
Usually, the connection part 52 of the operation member 50 to which the other end part is connected.
Is stopped by the biasing force of the tension coil spring 62.
Deploys by being in contact with A (separated from the fixed portion 44)
In this configuration, the opening 22 is closed. This state
Then, each bellows plate 42 </ b> A has a shutter contact of the recess 20.
Along the contact surface 24 (formation surface of the opening 22), they are aligned with each other.
And both ends in the longitudinal direction (the longitudinal direction of the case 14)
The upper surface of the part contacts the shutter contact surface 24 of the recess 20.
They are in contact (the state shown in FIG. 1A). On the other hand, the urging force of the tension coil spring 62 is resisted.
The operating member 50 is slid leftward (the connecting portion 52 is
Each of the shutter members 42 is
The bellows plates 42A are folded alternately to enlarge the opening 22
It is a configuration that is open (becomes the state shown in FIG. 1B). Next, the operation of this embodiment will be described.
The With the disk cartridge 10 having the above-described configuration,
When the disk medium 12 is not used, the opening 22 is
It is blocked by the shutter 40. That is, as shown in FIG.
Connection of the operating member 50 by the biasing force of the tension coil spring 62
The portion 52 is brought into contact with the stopper portion 20A of the case 14.
Of the shutter member 42 constituting the shutter 40.
Each bellows plate 42A contacts the shutter of the case 14
Are aligned with each other along the surface 24 at the front and rear ends.
The upper surface is contacted with the shutter contact surface 24 and the opening 22
Is blocked. As a result, the disc medium 12 is not used.
Dust intrusion into the disk cartridge 10 during use
Into the bottom surface 12B of the disk media 12
Dust adhesion is prevented. The disc cartridge 10 is a disc cartridge.
When using the media 12 (to the disc media 12
Recorded on the disc media 12 when recording information
When reproducing information), as shown in FIG.
14 along the direction of arrow A with the front surface 14A at the top.
It is loaded (inserted) into the insertion port 72 of the eve device 70. With this loading, the drive device 70 is opened.
The engaging portion 76 provided at the tip of the closing pin 74 is a slit.
34 enters the vicinity of the right edge of the operation unit 54 (operation member 50)
Engage with the right end face 54A and the front end face 54B. From this state, the disc cartridge 10 is removed.
When pushed further in the direction of arrow A, as shown in FIG.
By this pushing force, the open / close pin 74 is moved around the support shaft 78.
The operating member 50 is pulled by a tension coil spring while rotating in the direction of arrow D.
It is slid to the left against the urging force of 62, and the fixing portion 44
Close to. That is, the open / close pin 74 is in the direction of arrow D.
Is operated to a part of the pushing force in the direction of arrow A.
Operating force to the left of the work piece 50 (direction opposite to the arrow C direction)
Convert to Thereby, the shutter member 42 is each bellows.
Open the opening 22 while folding the plates 42A alternately.
The At this time, each guide pin 48 has a protrusion 48.
A and 48B, the first guide groove 26 and the guide, respectively.
The operation member 5 is guided by the slit 38.
0 is in the rear end portion 52A, the front end portion 52B, and the guide portion 58
The first guide groove 26, the guide slit 38, the first
2 Guided by the guide groove 28, the contact of the operating member 50
Each connecting portion 42B of the connecting portion 52 and the shutter member 42 is
Each rattling while sliding with the shutter contact surface 24
Move left (slide). As shown in FIG. 7, the disc cartridge
10 is inserted into the drive device 70 to a predetermined depth.
The disk cartridge 10 is in the drive device 70.
(The movement in the front-rear direction is prevented.
) This engages with the operation portion 54 of the operation member 50.
The opening / closing pin 74 rotates in the direction of arrow D and arrow E.
Since it is restricted, the operation member 50 is left to the left.
To the right by the urging force of the ride and tension coil spring 62
Both slides are regulated. In this state, the shutter
The material 42 is completely folded (the plate of each bellows plate 42A
And the opening 22 is completed.
At the same time, this open state is maintained. The disk cartridge 10 is positioned.
Then, the rotating spindle shaft is inserted from the opened opening 22.
Is done. This rotating spindle shaft is
The center hole 12A of the squemedia 12 is engaged or attracted.
Hold and rotate the disk media 12 around the axis.
The Further, a recording / reproducing head is inserted from the opening 22,
Record information on the recording surface of the disk medium 12, or
The information recorded on the recording surface is reproduced. On the other hand, the disc cartridge 10 is
When being ejected from the eve device 70, the positioning state is
Canceled. Then, the disk cartridge 10 is pulled.
The operating member 50 is moved to the right by the biasing force of the tension coil spring 62.
Engage with the operating portion 54 of the operating member 50 while sliding
The opening / closing pin 74 to be rotated is rotated in the direction of arrow E. Thus, the disk cartridge 10
Is discharged from the insertion opening 72 while closing the opening 22.
That is, the operating member 50 slides to the right and the fixing portion 4
When separated from 4, the shutter member 42 moves to each bellows pre-
The opening 22 is closed while the seat 42A is deployed, and the connecting portion 5
When 2 abuts against the stopper portion 20A of the case 14, the opening 2
2 is restored to the initial state in which 2 is completely closed. Again,
As in the case of opening the opening 22, the connecting portion 52 has the first guide groove 2.
6, by the guide slit 38 and the second guide groove 28.
Slide to the right while being guided and guide
48 is formed by the first guide groove 26 and the guide slit 38.
Move to the right while being guided. On the other hand, the open / close pin 74 is rotated in the direction of arrow E.
Urged in the direction of arrow C by the tension coil spring 62
Part of the force is engaged with the open / close pin 74 in the operation member 50
Behind the disc cartridge 10 to be
Disk cartridge converted into discharge force in the opposite direction)
10 moves backward. Opening / closing pin 74 returns to the initial position
Then, the rear part of the disk cartridge 10 is inserted.
It is discharged from the mouth 72 (the state shown in FIG. 5 is obtained). This state
Therefore, the disk cartridge 10 is manually inserted, for example.
It is taken out from the live device 70 (insertion slot 72). Here, it contacts the other end of the shutter member 42.
The continued operation member 50 is moved toward and away from the fixed portion 44.
The first guide groove 26 and the second guide groove 2 that are guided along
In other words, the operation member 50 has both ends thereof.
Can be slid only in the opening / closing direction of the opening 22
The first guide groove 26 and the second guide groove 26
2 The operation member 50 opens the opening 22 by the guide groove 28.
The fixing portion 44 is not separated from the case 14 when closing.
Make sure to contact and separate. That is, the operation member 50 is in contact.
The other end of the connected shutter member 42 is opposed to the fixed portion 44.
The shutter member 42 is reliable and stable.
To actuate (fold, unfold). As described above, the shutter 40 is entirely
As a shutter member without sliding with the case 14
42 to the connecting portion 42B and the connecting portion 52 of the operating member 50.
Only the front and rear end portions slide with the shutter contact surface 24.
Sliding with the case 14 to open and close the opening 22
(Contact) Area is extremely small. For this reason, with case 14
Suppressing generation of wear powder accompanying sliding with the shutter 40 or
Can be prevented. Further, one end of the cable is fixed at the fixing portion 44.
The bellows-like shutter member 42 fixed to the sleeve 14 is folded.
In other words, in order to open the opening 22,
Shutter 40 which is a sliding part of the motor 40 and the case 14
The contact surface 24 is not damaged when the disk cartridge 10 is stored.
By the utter 40 (the shutter member 42 and the connecting portion 52)
So that dust etc. adhere to the sliding part.
There is nothing to do. As a result, the opening / closing of the opening 22
Out of case 14 due to sliding of cutter 40 and case 14
Dust adhering to the surface enters the case 14 through the opening 22
Is prevented. As described above, the disk according to the present embodiment.
In the cartridge 10, the shutter 40 (shutter portion
The sliding area between the material 42) and the case 14 is small, and the dustproofness is better.
And the shutter member 42 stably opens the opening 22.
Close. In particular, in the disk cartridge 10, the operation is performed.
The movement of the working member 50 in the direction other than the contact / separation direction is surely restricted.
Therefore, the shutter member 42 is
Along with opening and closing, each bellows plate 42A connecting portion (adhesive tape)
Excessive load in the tensile direction or shear direction acts on
It operates more reliably and stably without any problems. Further, the operation member 50 excludes the contact / separation direction.
Since the movement in the direction of
Driving force for opening and closing (operation force and tension by the opening and closing pin 74
The biasing force of the coil spring 62)
Operating portion 54 (spring hook 6
0) (in the direction intersecting the above-mentioned contact / separation direction)
Even when force or moment is applied)
In the above contact and separation direction by the groove 26, the second guide groove 28, etc.
The fixed part 44 is contacted and separated reliably. For this reason,
Opening and closing mechanism of shutter 40 and drive device 70 (opening and closing
The degree of freedom in designing the pin 74) is improved. Further, the shutter member 42 has each connecting portion.
A guide pin 48 provided on 42B is connected to the first guide groove 26.
And the folding direction (the above contact) by the guide slit 38.
Open and close the opening 22 while being guided along the separation direction)
Therefore, the middle part is separated from the case 14 when the opening 22 is opened and closed.
(The connecting portion 42B is not in contact with the shutter contact surface 24).
) And operates more reliably and stably. Here, the operation member 50 is attached to the fixed portion 44.
A tension coil spring 62 for biasing in the separating direction is provided.
Therefore, in the drive device 70, the operation member 50 is fixed to the fixing portion 4.
No need for a mechanism to close the opening 22 apart from the
The structure is simplified. That is, the open / close pin 74 is simply
Rotating around the spindle 78 in the direction of arrow D and arrow E
Manipulate the pushing force of the disk cartridge 10
It is converted into a driving force to the left of the member 50 and a tensile coil
The urging force of the spring 62 in the direction of arrow C is applied to the disc cartridge.
It is sufficient to convert it to the discharge force of the die 10, and the structure is simple. Furthermore, in the disk cartridge 10,
The shutter members 42 constituting the shutter 40 are alternately
In other words, to open the opening 22 in the folded state,
For example, the shutter member 42 has a width direction (left and right sides of the case 14).
Opening 22 while reducing the size of the folding direction).
The shutter member is simply wide
Shutter member 42 in comparison with the configuration of sliding in the direction
The accommodation space for (shutter 40) is reduced. As a result, the size of the opening 22 is maintained.
The case 14 is reduced in size, and conversely the case 14
The opening 22 can be enlarged while maintaining the dimensions, and a large recording / reproducing operation can be performed.
It becomes possible to correspond to the head. That is, like the conventional plate-like
The shutter member slides along the case.
The maximum dimension in the left-right direction of the opening 22 is the right and left of the case 14
Half of the direction dimension (considering access to the center hole 12A
Then it becomes smaller, and one shutter member
In the configuration shown in FIG. 8 that opens in both directions, it was 1/3).
Is provided with a folding (bellows) shutter member 42
Can greatly expand the horizontal dimension of the opening 22
The For this reason, the drive device 70 has a large optical pick.
Can be used and the manufacturing cost is low
Is reduced. In the above embodiment, the shutter
As an example of the member 42, there are six bellows plates 42A.
However, the present invention is not limited to this.
The tar member 42 includes two or more bellows plates 42A.
(The fixed portion 44 may be attached to the plate member that is folded alternately.
Or the connecting portion 52). Ie shutter
The member 42 is configured such that the connecting portion 42B is not formed.
The guide pin 48 may be omitted.
Yes. In this case, the guide slit 38 (guide plate 3
It goes without saying that 6) need not be provided. In the above embodiment, the folding shape is used.
State of the shutter member 42 from the lower surface 18A of the case 14
Although a downward projecting configuration is shown, the present invention is not limited to this.
Increase the number of bellows plates 42A (reduce the width)
The shutter member 42 in the folded state
It is good also as a structure which does not protrude from the lower surface 18A of 14. Furthermore, in the above embodiment, the shutter
-Folding direction of member 42 (moving direction of operation member 50)
Is orthogonal to the loading direction (arrow A direction) to the drive device 70
The direction is the direction to the left (left direction).
For example, the operation member 50 moves rearward
The shutter member 42 may be folded.
In this configuration, the opening / closing structure of the opening 22 of the drive device 70 is
Simplified. Furthermore, in the above embodiment, the shutter is shut down.
Of the opening 22 that is both ends of the folding member 42 in the folding direction.
A structure in which shutter contact surfaces 24 are formed on both the left and right sides;
However, the present invention is not limited to this, and the shutter contact surface
24 is one that intersects the folding direction of the shutter member 42
Provided at the end of the direction (outer edge of the front and rear of the opening 22)
It is sufficient that the central portion in the longitudinal direction of the fixing portion 44 and the connecting portion 52 is sufficient.
It is good also as a structure which does not contact | abut to the shutter contact surface 24. FIG.
In addition, in a preferable configuration in which the opening 22 is formed in the recess 20
It goes without saying that it is not limited. In the above embodiment, the operation member 5 is used.
0 is fixed by the first guide groove 26 and the second guide groove 28
Although it is configured to be guided in the approaching / separating direction with respect to the portion 44,
In the present invention, the end of the shutter member 42 opposite to the fixed portion 44 is provided.
Both end portions of the operation member provided in the portion are shutter members 42.
It is guided to be slidable in the opening and closing direction of the opening 22 by
If necessary, the size and shape of the operation member 50 and the first guide groove 2 are sufficient.
6. It is not limited to the arrangement of the second guide groove 28, etc.
Yes. Further, the shutter member 42 is connected via the fixing portion 44.
The structure fixed to the case 14 is not limited, and the adhesive tape
Folded with respect to the case 14 by the cap 46 or hinge structure
You may attach directly so that folding is possible. Furthermore, in the above embodiment, the operation member
Biasing means for biasing 50 in the direction away from the fixed portion 44
The tension coil spring 62 as a configuration is provided.
The invention is not limited to this, for example, the tension coil spring 62
Instead of compression coil springs, torsion springs, mainsprings
Ne etc. can also be used. Furthermore, in the above embodiment, the sh
A plurality of bellows plates 42A constituting the utter member 42;
The fixing portion 44 and the operation member 50 are exchanged by the adhesive tape 46.
Although it is configured to be foldable to each other, the present invention
For example, each bellows plate 42A is not limited to this.
Instead of adhesive tape 46, ultrasonic welding, hinge structure, etc.
Thus, they may be connected so that they can be folded alternately. In the above embodiment, the opening 22
In the closed state, the shutter member 42 is fully deployed.
(Each bellows plate 42A is flush with each other and
A preferred structure to contact the cutter contact surface 24)
However, the present invention is not limited to this. For example, the shutter unit
The material 42 does not protrude beyond the lower end of the recess 20.
And adjacent bellows plates 42A are inclined to each other
The opening 22 or the like may be closed with However, in this configuration, each
Gap formed at both longitudinal ends of the bellows plate 42A
It is desirable to provide a wall or the like for closing. Furthermore, in the above embodiment, the shutter
-The member 42 abuts its upper surface against the shutter abutment surface 24.
However, the present invention is preferably configured to close the opening 22.
For example, the shutter member 42 is not limited to this.
When the upper surface is not in contact with the case 14 in the unfolded state,
The inner edge of the opening 22 is the side end face in the direction orthogonal to the folding direction.
(The side wall defining the opening 22, for example, the front is sealed.
The inner surface of the recessed recess 20 slidably contacted with the opening 2
2 may be closed. Furthermore, in the above embodiment, the
The sukumedia 12 is a single-sided recording type, and the opening 22 is
Although it was set as the structure provided in the lower side of case 14, this invention is
However, the present invention is not limited to this.
A surface recording type with an opening 22 on the upper side.
Shutter member 42 that opens and closes the upper and lower openings (shutter
40) can also be arranged respectively. As described above, the disk according to the present invention is displayed.
The cartridge is a sliding surface between the shutter member and the case.
Less dust and improved dust resistance, and shutter member is open
Has an excellent effect of stably opening and closing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view of a disk cartridge according to an embodiment of the present invention as viewed from below, (A) is a perspective view showing a closed state of an opening, (B). FIG. 3 is a perspective view showing an open state of the opening. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. FIG. 3 is a view showing a shutter member constituting the disk cartridge according to the embodiment of the invention, and FIG.
Is a perspective view showing the entire configuration of the shutter member, (B) is an enlarged perspective view showing a connecting structure of the shutter member. 4A and 4B are views showing a guide pin mounting structure to a shutter member constituting the disk cartridge according to the embodiment of the present invention, wherein FIG. 4A is a front view showing a substantially unfolded state of a connecting portion; ) Is a front view showing a substantially folded state of the connecting portion. FIG. 5 is a partially cutaway bottom view showing a state before the opening is opened in the process of loading the disk cartridge into the drive device according to the embodiment of the present invention. FIG. 6 is a partially cutaway bottom view showing a state in the middle of opening of the opening in the process of loading the disk cartridge into the drive device according to the embodiment of the present invention. FIG. 7 is a partially cutaway bottom view showing a state where loading of the disk cartridge into the drive device according to the embodiment of the present invention is completed. 8A and 8B are diagrams showing a conventional disk cartridge, in which FIG. 8A is a perspective view showing a closed state of an opening, and FIG. 8B is a perspective view showing an opened state of the opening. [Description of Symbols] 10 Disc cartridge 12 Disc media 14 Case 22 Opening 26 First guide groove (guide means) 28 Second guide groove (guide means) 42 Shutter member 42A Bellows plate (plate-like member) 50 Operation member

Claims (1)

1. A case in which a disk-shaped disk medium is rotatably accommodated, an opening provided in the case for accessing the disk medium, and a plurality of plate-like members alternately. The shutter member is connected to the case so that it can be folded and unfolded, and one end portion in the folding direction is fixed to the case, and the other end portion of the shutter member is slid to fold the shutter member to open the opening. An operating member that opens or expands the shutter member to close the opening, and a guide unit that is provided in the case and guides both end portions of the operating member so as to be slidable in the opening and closing direction of the opening. cartridge.